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1981
UI - Skripsi (Membership)
Lilik Sujandi, author
Fakultas Psikologi Universitas Indonesia, 2005
UI - Tesis (Membership)
Kidder, Louise H.
McGraw-Hill, 1975
Buku Teks
Shapiro, Harry L.
UNESCO, 1953
Buku Teks
MacNair, Harley Farnsworth
D.van Nostrand Company,Inc., 1955
Buku Teks